MySql不支持主外键

1 Create Table
2 
3 CREATE TABLE `person` (
4   `id` varchar(32) NOT NULL,
5   `NAME` varchar(30) DEFAULT NULL,
6   PRIMARY KEY (`id`)
7 ) ENGINE=InnoDB DEFAULT CHARSET=gbk

CREATE TABLE person
(
    id VARCHAR(32) PRIMARY KEY,
    NAME VARCHAR(30)
)ENGINE=INNODB DEFAULT CHARSET=GBK
 
 CREATE TABLE cars
 (
    id VARCHAR(32) PRIMARY KEY,
    NAME VARCHAR(50),
    price NUMERIC(5,2),
    pid VARCHAR(32),
    CONSTRAINT c_fk FOREIGN KEY(pid) REFERENCES person(id)
 )ENGINE=INNODB CHARSET=GBK;